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CVE-2026-75908— Newsletters <= 4.17 - Missing Authorization to Authenticated (Author+) Arbitrary Modification via 'newsletters_mailinglistsroles' POST Parameter

Quick assessment

Affected
contrid Newsletters
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress Newsletters是WordPress基金会的一款新闻通讯管理工具。 WordPress Newsletters 4.17及之前版本存在授权问题漏洞，该漏洞源于未正确验证用户是否被授权执行操作，攻击者可通过伪造POST字段（如newsletters_mailinglistsroles参数）传递角色标识给get_users()函数，导致授权绕过，可能允许已认证的攻击者（作者级别及以上）向任意WordPress角色用户（包括管理员）发送任意新闻邮件，造成未经授权的群发邮件和潜在钓鱼攻击

CVSS 4.3 · Medium EPSS 0.39% · P31

Affected Version Matrix 1

VendorProduct Version RangeStatus
contrid Newsletters ≤ 4.17 affected
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I. Basic Information for CVE-2026-75908

Vulnerability Information
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Vulnerability Title
Newsletters <= 4.17 - Missing Authorization to Authenticated (Author+) Arbitrary Modification via 'newsletters_mailinglistsroles' POST Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
The Newsletters plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 4.17. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with author-level access and above, to send arbitrary newsletter emails to users of any WordPress role, including administrators, by forging POST fields during a normal post submission. This allows an attacker-supplied role slug via the newsletters_mailinglistsroles POST field to be passed directly to get_users(), enabling unauthorized mass-mailing and potential phishing against privileged site users through the site's own outbound email channel.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress Newsletters 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Newsletters是WordPress基金会的一款新闻通讯管理工具。 WordPress Newsletters 4.17及之前版本存在授权问题漏洞，该漏洞源于未正确验证用户是否被授权执行操作，攻击者可通过伪造POST字段（如newsletters_mailinglistsroles参数）传递角色标识给get_users()函数，导致授权绕过，可能允许已认证的攻击者（作者级别及以上）向任意WordPress角色用户（包括管理员）发送任意新闻邮件，造成未经授权的群发邮件和潜在钓鱼攻击
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
contrid Newsletters 0 ~ 4.17 -

II. Public POCs for CVE-2026-75908

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III. Intelligence Information for CVE-2026-75908

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Patches & Fixes for CVE-2026-75908 (1)

Vendor Advisories for CVE-2026-75908 (1)

Vendor Pages for CVE-2026-75908 (2)

Other References for CVE-2026-75908 (1)

IV. Related Vulnerabilities

Same product: Newsletters
Same vendor: contrid
Same weakness: CWE-862

V. Comments for CVE-2026-75908

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